feat: added context manager for scan export

Description

Add decorator to be able to export multiple scans into single csv file.

Example usage:

1. direct usages

from bec_lib.utils import scan_to_csv
s = scans.line_scan(...)
scan_to_csv(s, "export.csv")

or for multiple scans

s = scans.line_scan(...)
s2 = scans.grid_scan(...)
scan_to_csv([s,s2], export.csv)

2. context manager

with scans.scan_export("export.csv"):
    scans.line_scan(...)
    scans.grid_scan(...)

Note, using the context manager will only create one output for all executed scans

Related Issues

• closes #81 (closed) and #161 (closed)

Type of Change

• introduces decorator for scan definition
• bugfix for bec_lib.utils.scan_to_dictdue to new data structure ( see #161 (closed))

Potential side effects

...

Screenshots / GIFs (if applicable)

Additional Comments

merge blocked by #161 (closed)

Definition of Done

• fix scan_to_dict function
• add tests for scan_report structure
• Test context manager usage for multiple scans
• Add screenshot of example usage
• Documentation is up-to-date.