Add bbclasses tool

[Notgnoshi]

Closes #63

[Notgnoshi]

TODO: Run bbclasses on a simple third party recipe, and include example in the README.

[Notgnoshi]

How well does this render? Should I use a prerendered SVG or just include mermaid in the README?

flowchart LR
    subgraph meta[meta]
        poky/meta/classes-global/debian.bbclass{{"poky/meta/classes-global/debian.bbclass"}}
        poky/meta/classes-global/package.bbclass{{"poky/meta/classes-global/package.bbclass"}}
        poky/meta/classes-global/package_pkgdata.bbclass{{"poky/meta/classes-global/package_pkgdata.bbclass"}}
        poky/meta/classes-global/package_rpm.bbclass{{"poky/meta/classes-global/package_rpm.bbclass"}}
        poky/meta/classes-global/packagedata.bbclass{{"poky/meta/classes-global/packagedata.bbclass"}}
        poky/meta/classes-recipe/autotools.bbclass{{"poky/meta/classes-recipe/autotools.bbclass"}}
        poky/meta/classes-recipe/binconfig.bbclass{{"poky/meta/classes-recipe/binconfig.bbclass"}}
        poky/meta/classes-recipe/multilib_header.bbclass{{"poky/meta/classes-recipe/multilib_header.bbclass"}}
        poky/meta/classes-recipe/multilib_script.bbclass{{"poky/meta/classes-recipe/multilib_script.bbclass"}}
        poky/meta/classes-recipe/pkgconfig.bbclass{{"poky/meta/classes-recipe/pkgconfig.bbclass"}}
        poky/meta/classes-recipe/ptest.bbclass{{"poky/meta/classes-recipe/ptest.bbclass"}}
        poky/meta/classes-recipe/siteinfo.bbclass{{"poky/meta/classes-recipe/siteinfo.bbclass"}}
        poky/meta/classes-recipe/update-alternatives.bbclass{{"poky/meta/classes-recipe/update-alternatives.bbclass"}}
        poky/meta/classes/chrpath.bbclass{{"poky/meta/classes/chrpath.bbclass"}}
        poky/meta/classes/image-buildinfo.bbclass{{"poky/meta/classes/image-buildinfo.bbclass"}}
        poky/meta/classes/siteconfig.bbclass{{"poky/meta/classes/siteconfig.bbclass"}}
        poky/meta/conf/distro/include/ptest-packagelists.inc[["poky/meta/conf/distro/include/ptest-packagelists.inc"]]
        poky/meta/recipes-support/curl/curl_8.7.1.bb["poky/meta/recipes-support/curl/curl_8.7.1.bb"]
    end
    subgraph meta-oem[meta-oem]
        meta-oem/classes/dynamic-packagearch.bbclass{{"meta-oem/classes/dynamic-packagearch.bbclass"}}
        meta-oem/classes/machine-overrides-extender.bbclass{{"meta-oem/classes/machine-overrides-extender.bbclass"}}
    end
    poky/meta-poky/classes/poky-sanity.bbclass{{"poky/meta-poky/classes/poky-sanity.bbclass"}}
    meta-work/recipes-support/curl/curl__.bbappend(["meta-work/recipes-support/curl/curl_%.bbappend"])
    meta-oem/classes/dynamic-packagearch.bbclass -->|"INHERIT"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    meta-oem/classes/machine-overrides-extender.bbclass -->|"INHERIT"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta-poky/classes/poky-sanity.bbclass -->|"INHERIT"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-global/debian.bbclass -->|"INHERIT"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-global/package.bbclass -->|"inherit"| poky/meta/classes-global/debian.bbclass
    poky/meta/classes-global/package.bbclass -->|"inherit"| poky/meta/classes-global/package_rpm.bbclass
    poky/meta/classes-global/package_pkgdata.bbclass -->|"inherit"| poky/meta/classes-global/package.bbclass
    poky/meta/classes-global/package_rpm.bbclass -->|"INHERIT"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-global/package_rpm.bbclass -->|"INHERIT"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-global/packagedata.bbclass -->|"inherit"| poky/meta/classes-global/package.bbclass
    poky/meta/classes-recipe/autotools.bbclass -->|"inherit"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-recipe/autotools.bbclass -->|"inherit"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-recipe/binconfig.bbclass -->|"inherit"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-recipe/binconfig.bbclass -->|"inherit"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-recipe/multilib_header.bbclass -->|"inherit"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-recipe/multilib_header.bbclass -->|"inherit"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-recipe/multilib_script.bbclass -->|"inherit"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-recipe/multilib_script.bbclass -->|"inherit"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-recipe/pkgconfig.bbclass -->|"inherit"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-recipe/pkgconfig.bbclass -->|"inherit"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-recipe/ptest.bbclass -->|"inherit"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-recipe/ptest.bbclass -->|"inherit"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes-recipe/siteinfo.bbclass -->|"inherit"| poky/meta/classes-recipe/autotools.bbclass
    poky/meta/classes-recipe/siteinfo.bbclass -->|"inherit"| poky/meta/classes-recipe/multilib_header.bbclass
    poky/meta/classes-recipe/update-alternatives.bbclass -->|"inherit"| poky/meta/classes-recipe/multilib_script.bbclass
    poky/meta/classes/chrpath.bbclass -->|"inherit"| poky/meta/classes-global/package.bbclass
    poky/meta/classes/image-buildinfo.bbclass -->|"INHERIT"| poky/meta/recipes-support/curl/curl_8.7.1.bb
    poky/meta/classes/siteconfig.bbclass -->|"inherit"| poky/meta/classes-recipe/autotools.bbclass
    poky/meta/conf/distro/include/ptest-packagelists.inc -->|"require"| poky/meta/classes-recipe/ptest.bbclass
    poky/meta/recipes-support/curl/curl_8.7.1.bb -->|"appends"| meta-work/recipes-support/curl/curl__.bbappend

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