chore: bump version to 0.8.2 and update changelog

[VPRamon]

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[github-actions]

Package	Line Rate	Complexity	Health
qtty-core.src.units.mass	92%	0	✔
qtty-core.src.units.power	92%	0	✔
qtty-core.src.units.area	93%	0	✔
qtty-core.src.units.photometry	82%	0	✔
qtty-core.src.units.velocity	100%	0	✔
qtty-ffi.src.ffi	96%	0	✔
qtty-core.src.units.length	88%	0	✔
qtty-core.src.units.time	88%	0	✔
qtty-core.src.units.solid_angle	100%	0	✔
qtty-core.src.units.angular	98%	0	✔
qtty-core.src	95%	0	✔
qtty-core.src.units.volume	85%	0	✔
qtty-derive.src	100%	0	✔
qtty-ffi.src	99%	0	✔
qtty.src	95%	0	✔
qtty-core.src.units	82%	0	✔
qtty-core.src.units.radiometry	82%	0	✔
Summary	93% (4380 / 4685)	0	✔