Sqlmath

- sqlmath - add builtin sql-function jenks() which is a fast 1d, ml classifier
- sqlmath - merge/streamline buildstep sqlmath_custom.c into sqlmath_base.c
- sqlmath - remove unused responseType = lastMatrixDouble
- sqlmath - export c-function dbExec to wasm
- sqlmath - replace Str99 with sqlite-builtin JsonString
- update to sqlite v3.38.1
- ci - add fileCount check
- sqlmath - re-enable building shell-executable
- sqlmath - use sqlite-builtin jsonstring instead of str99 for extension kthpercentile
- sqlmath - remove zlib.h and use handcoded headers instead
- split build-step sqlite3_c to sqlite3_c, sqlite3_ext_c, to deduplicate definition SQLITE3_C2
- add shell-function shCiBuildWasm() to build wasm binaries with online demo spa.sqlchart.html
- update to sqlite v3.38.0
- create github-branch-artifact to upload shared binaries

- update jslint v2022.2.20
- add sqlite-function RANDOM1() generating random-float between 0 <= xx < 1
- remove file sqlmath_old.js
- add sql-function kthpercentile(val, percentile)
- update sql-functions compress(), uncompress() with null check/guard

- npm publish v2021.10.20
- update to jslint v2021.10.20
- refactor - replace nodejs-buffer-api-calls with DataView / TextDecoder / TextEncoder

- revamp - update to jslint_ci.sh from 2020.10.2

- add sql-function slr_ohlcv() with tests
- update file jslint_ci.sh with chorish shell-functions
- update function dbOpenAsync with ability to create thread-pool with multiple connections

- merge files in sqlite-autoconf-3360000 into sqlite3.c, sqlite3_ext.c, sqlite3_shell.c