Strip tabs and trailing white spaces, and fix end of files (#748)

* format: Strip trailing whitespaces

We want to get rid of trailing whitespaces completly as they make just git
noice. Much better to start using automated tools to get rid of them once and
not getting them back again. This way git history will be cleaner and review
easier.

Commit was generated with:

    pre-commit run --all-files trailing-whitespace

* format: Files should have exactly one new line end of them

It is good practice that every file has one new line. It is not now days so
mandatory but it also is not nice if file has lot of newlines end of it. We will
use pre-commit which takes automatically care about this so let's fix all.

Commit was generated with:

    pre-commit run --all-files end-of-file-fixer

* format: Convert tabs to spaces

Project mostly use spaces over tabs. When mixing tabs and spaces this usually
makes formatting issues and also when changing those in commits it will make lot
of git noise. We will force spaces most of the time and use pre-commit to fix.

Commit was generated with:

    pre-commit run --all-files remove-tabs

---------

Co-authored-by: Kari Argillander <kari.argillander@fidelix.com>

apps/perl/readme.txt

@@ -1,14 +1,14 @@
 The BACnet Scriptable (using Perl) Tool.
 
-* Running this tool assumes that the library has been already built. The 
+* Running this tool assumes that the library has been already built. The
   library should be built with a command similar to
-  
+
   CC=/mingw/bin/gcc BACNET_DEFINES="-DPRINT_ENABLED -DBACAPP_ALL -DBACFILE
   -DINTRINSIC_REPORTING" BBMD_DEFINE=-DBBMD_ENABLED\=1 BACNET_PORT=win32 make
   clean library
 
 * Currently, the tool assumes only win32 port, but should be easily modifiable
-  for any port  build. 
+  for any port  build.
 * This tool has to be run from a path without any spaces. The presence of the
   .Inline directory is required.
 * Run the tool without any arguments to see usage instructions
@@ -16,5 +16,3 @@ The BACnet Scriptable (using Perl) Tool.
   Value) for Device at instance 1234 run the following command
 
   perl bacnet.pl --script example_readprop.pl -- 1234
-
-