7842 - new directory organization

Baremetal is now the default build target and therefore has its sources
at the top-level. Baremetal programs build using the phase-2 Mu toolchain
that requires a Linux kernel. This phase-2 codebase which used to be at
the top-level is now under the linux/ directory. Finally, the phase-2 toolchain,
while self-hosting, has a way to bootstrap from a C implementation, which
is now stored in linux/bootstrap. The bootstrap C implementation uses some
literate programming tools that are now in linux/bootstrap/tools.

So the whole thing has gotten inverted. Each directory should build one
artifact and include the main sources (along with standard library). Tools
used for building it are relegated to sub-directories, even though those
tools are often useful in their own right, and have had lots of interesting
programs written using them.

A couple of things have gotten dropped in this process:
  - I had old ways to run on just a Linux kernel, or with a Soso kernel.
    No more.
  - I had some old tooling for running a single test at the cursor. I haven't
    used that lately. Maybe I'll bring it back one day.

The reorg isn't done yet. Still to do:
  - redo documentation everywhere. All the README files, all other markdown,
    particularly vocabulary.md.
  - clean up how-to-run comments at the start of programs everywhere
  - rethink what to do with the html/ directory. Do we even want to keep
    supporting it?

In spite of these shortcomings, all the scripts at the top-level, linux/
and linux/bootstrap are working. The names of the scripts also feel reasonable.
This is a good milestone to take stock at.

1 files changed, 43 insertions, 0 deletions

diff --git a/editor/subx.dte b/editor/subx.dte
new file mode 100644
index 00000000..cab7b72d
--- /dev/null
+++ b/editor/subx.dte
@@ -0,0 +1,43 @@
+# Syntax highlighting for https://gitlab.com/craigbarnes/dte
+#
+# To install this file, symlink it to ~/.dte/syntax/subx
+# Then add this line to ~/.dte/rc:
+#   ft subx subx
+
+syntax subx
+
+# For improved colorization, add lines like these in your ~/.dte/rc (the
+# precise colors here assume the default color scheme in a 256-color terminal):
+#   hi subx.comment0 25 underline
+#   hi comment 25
+#   hi subx.comment2 19
+#   hi subx.comment3 245
+default comment subx.comment0 subx.comment2 subx.comment3
+
+state start code
+    str "# . ." subx.comment3
+    str "# ." subx.comment2
+    str "# -" subx.comment0
+    char # comment
+    char '"' string
+    eat this
+
+state comment
+    char "\n" start
+    eat this
+
+state subx.comment0
+    char "\n" start
+    eat this
+
+state subx.comment2
+    char "\n" start
+    eat this
+
+state subx.comment3
+    char "\n" start
+    eat this
+
+state string
+    char "\"" start string
+    eat this