Add other file types in SlackFileType

[ironakpatel]

Requesting if other supported file types can be added in SlackFileType - currently only supports
these:

    TEXT("text"),
    GIF("gif"),
    CSV("csv"),
    JPG("jpg"),
    PNG("png"),
    UNKNOWN("unknown");

Please add support for these or auto or Change emu to String:

Type | Description
-- | --
auto | Auto Detect Type
text | Plain Text
ai | Illustrator File
apk | APK
applescript | AppleScript
binary | Binary
bmp | Bitmap
boxnote | BoxNote
c | C
csharp | C#
cpp | C++
css | CSS
csv | CSV
clojure | Clojure
coffeescript | CoffeeScript
cfm | ColdFusion
d | D
dart | Dart
diff | Diff
doc | Word Document
docx | Word document
dockerfile | Docker
dotx | Word template
email | Email
eps | EPS
epub | EPUB
erlang | Erlang
fla | Flash FLA
flv | Flash video
fsharp | F#
fortran | Fortran
gdoc | GDocs Document
gdraw | GDocs Drawing
gif | GIF
go | Go
gpres | GDocs Presentation
groovy | Groovy
gsheet | GDocs Spreadsheet
gzip | GZip
html | HTML
handlebars | Handlebars
haskell | Haskell
haxe | Haxe
indd | InDesign Document
java | Java
javascript | JavaScript/JSON
jpg | JPEG
keynote | Keynote Document
kotlin | Kotlin
latex | LaTeX/sTeX
lisp | Lisp
lua | Lua
m4a | MPEG 4 audio
markdown | Markdown (raw)
matlab | MATLAB
mhtml | MHTML
mkv | Matroska video
mov | QuickTime video
mp3 | mp4
mp4 | MPEG 4 video
mpg | MPEG video
mumps | MUMPS
numbers | Numbers Document
nzb | NZB
objc | Objective-C
ocaml | OCaml
odg | OpenDocument Drawing
odi | OpenDocument Image
odp | OpenDocument Presentation
ods | OpenDocument Spreadsheet
odt | OpenDocument Text
ogg | Ogg Vorbis
ogv | Ogg video
pages | Pages Document
pascal | Pascal
pdf | PDF
perl | Perl
php | PHP
pig | Pig
png | PNG
post | Slack Post
powershell | PowerShell
ppt | PowerPoint presentation
pptx | PowerPoint presentation
psd | Photoshop Document
puppet | Puppet
python | Python
qtz | Quartz Composer Composition
r | R
rtf | Rich Text File
ruby | Ruby
rust | Rust
sql | SQL
sass | Sass
scala | Scala
scheme | Scheme
sketch | Sketch File
shell | Shell
smalltalk | Smalltalk
svg | SVG
swf | Flash SWF
swift | Swift
tar | Tarball
tiff | TIFF
tsv | TSV
vb | VB.NET
vbscript | VBScript
vcard | vCard
velocity | Velocity
verilog | Verilog
wav | Waveform audio
webm | WebM
wmv | Windows Media Video
xls | Excel spreadsheet
xlsx | Excel spreadsheet
xlsb | Excel Spreadsheet (Binary, Macro Enabled)
xlsm | Excel Spreadsheet (Macro Enabled)
xltx | Excel template
xml | XML
yaml | YAML
zip | Zip

[szabowexler]

We're a little swamped with covid19 adjustments at the moment. Generally speaking I'm happy to add particular file types as needed, but the fastest option right now is probably to add in the types you need that are currently blocking you. Apologies I can't give a snappier more satisfying answer at the moment.