* add `filenames` specification in `ModeDef` structures
* generic mode probing can match a list of filenames
* remove unneeded mode_probe functions
* this enables diff coloring on Makefile
* fix bug on character constants ('(' ...) when styles are disabled
* fix end of comment/regex detection when scanning strings
* handle double escapes: "\\\"" is a 2 character string
* stop scanning when reaching outer block boundary
* scan blocks of comments as a single entity
Clarify tiny build options:
* distinguish `tiny` which controls whether the tiny version should be built
* and `tiny_only` which restricts the build to just the tiny version
* add `--disable-tiny` to set `tiny=no`
* add `--tiny-only` to only build the tiny version
* add js, json and c2 modes in tiny version
* use `BC_REUSE | BC_CLEAR` to avoid killing the `*occur*` buffer
* this ensures the `*occur*` buffer stays current in windows that show it
* modify the `BC_CLEAR` semantics to imply `BC_REUSE`
* simplify calls: remove redundant `BC_REUSE` flag
* use complete list of internal commands
* use tcl specific word parser
* fix quoted and braced string parsers
* improve variable colorizer
* add custom cases in probe function
* add `ustr_match_str`
* add `CLANG_C_TYPES` flag for generic C types
* add `CLANG_C_KEYWORDS` flag for generic C keywords
* add `CLANG_T_TYPES` flag for generic `xxx_t` types
* more explicit regex testing
* support for `u`, `U` and `u64` encoding prefixes
* improve comment detection in diff output for js and c3
* change `get_c_identifier` API for consistency
* add `is_c_identifier_start()` and `is_c_identifier_part()`
* move `qe_haslower` to **util.c**
* update C2 language keyword and type lists
* improve Pike colorizer
* Fix `put_status`/`put_error` behavior
- use `put_error` instead of `put_status` for command errors
- prevent status message output to console during initialization
- use `put_error` for side effects in command errors
- add `&` prefix in status messages to force screen flush
- flush screen in `qe_display()`, remove redundant calls to `dpy_flush`
- fix gcc compilation errors and warnings
- remove most references to `global_screen`
- free font cache before closing the screen
- prevent mouse handling upon focus detection
* drop CI on macos-12
- rename `indent_size` window field as `indent_width` for consistency
- handle negative argval in `do_tabulate`
- fix reverse region in `indent-rigidly`
- only indent lines that start in the region, ie: lines whose beginning
offset >= start and < end
- fix `do_backspace` to delete a TAB worth of white space after TAB.
no longer use `undo` for this.
- fix `find_window` to locate window according to top-left corner of current
- add `unindent-region` on `M-C-|` to unindent current region
- add `unindent-buffer`
- redirect `S-RET` and `S-DEL` to their unshifted versions
- rename `c-indent-command` command as `c-indent-line-or-region`
* add `find_indent` and `make_indent` ancillary functions
* add `untabulate` on `S-TAB` to remove one indentation level
* rename `do_tab` as `do_tabulate` for consistency
* `tabulate` indents the region one level if visible
* add `indent-rigidly` commands: indent block interactively
* pass const `char32_t` array and `QETermStyle` array to `ColorizeFunc`
* add `cp_colorize_line()` wrapper to call colorizer function on null
terminated buffer.
* remove unused `EditBuffer` colorize fields
* remove `EditState` field `colorize_func`: rely on `colorize_mode` only
* no longer combine style into codepoint buffer.
* remove `STYLE_BITS`, `STYLE_SHIFT`, `CHAR_MASK`
* rename `set_colorize_func` as `set_colorize_mode`
* rename `SET_COLOR` and `SET_COLOR1` as `SET_STYLE` and `SET_STYLE1`
* add documentation for buffer API functions
