fix: python requirements files (#1768)

## Summary
The Python scripts in the current repo have many requirements that are
not mentioned in any requirements.txt files, so I have therefore added
them to the directories that need them.

Question: Should these changes maybe moved into a "root"
requirements.txt file?

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### AI Usage

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helps set the right context for reviewers.

Did you use AI tools to help write this code? _**NO**_

lib/EpdFont/scripts/requirements.txt

@@ -1 +1,2 @@
-freetype-py==2.5.1
+fonttools>=4.62.1
+freetype-py>=2.5.1

scripts/requirements.txt

@@ -0,0 +1,5 @@
+pillow>=12.2.0
+cairosvg>=2.9.0
+matplotlib>=3.10.9
+pyserial>=3.5
+colorama>=0.4.6