Given we've just run a build, this (a) seems unnecessary, and (b) seems
to go wrong in some circumstances anyway, e.g.
https://build.palaso.org/buildConfiguration/Keyman_Developer_Release/421326?buildTab=log&focusLine=19936&linesState=18839&logView=flowAware:
```
07:01:29 > @keymanapp/kmc@17.0.205-alpha prepublishOnly
07:01:29 > npm run build
07:01:29
07:01:31
07:01:31 > @keymanapp/kmc@17.0.205-alpha build
07:01:31 > tsc -b
07:01:31
07:01:35 ../../../common/web/types/build/src/kmx/kmx.d.ts(1,1): error TS1036: Statements are not allowed in ambient contexts.
07:01:35 ../../../common/web/types/build/src/kmx/kmx.d.ts(1,2): error TS1345: An expression of type 'void' cannot be tested for truthiness.
...
```
I missed adding this as a dependency for @keymanapp/kmc-package. because
node has a very lenient dependency search, it found xml2js from other
@keymanapp/common-types, so never caused errors locally.
Fixes#9640.
This ended up being somewhat more fragile than originally anticipated.
For the `ajv` cli call to get the right versions, we needed to install
ajv as a dev dependency in the top-level package.json as well as at the
common/web/types level.
Ajv does not do all that well with ESM yet, either, so we use esbuild to
transform the compiled validators before building in typescript.
Fixes#8795.
Relates to #9090.
Cleans up and makes consistent compiler messages in kmc, and related
unit tests.
Adds support for colorized messages.
After installing chalk for ansi coloring in kmc, @types/node needed to
be brought in sync with the Typescript version, per the suggestion of
checking against `npm dist-tags @types/node`,found in a discussion at
https://github.com/DefinitelyTyped/DefinitelyTyped/discussions/64262#discussioncomment-4905069
Additional tidying up includes:
* Deprecating a set of functions in compiler-interfaces, bringing them
together under a new CompilerError class.
Separating CompilerErrorSeverity and CompilerErrorMask enums.
* Making CompilerError.formatEvent (formerly compilerEventFormat) print
messages in the same format as NodeCompilerCallbacks (sans coloring).
* Adding a wrapper class for CompilerCallbacks that manages the filename
reporting, used currently exclusively by kmc itself.
