feat(Padics): add an instance IsValuativeTopology ℚ_[p]

[WenrongZou]

In this PR, we prove an instance IsValuativeTopology ℚ_[p]. Then we have the instance IsNonarchimedeanLocalField ℚ_[p].

---

[github-actions]

PR summary b0d6ade587

Import changes exceeding 2%

%	File
+17.80%	Mathlib.NumberTheory.Padics.ValuativeRel

Import changes for modified files

Dependency changes

File	Base Count	Head Count	Change
Mathlib.NumberTheory.Padics.ValuativeRel	1843	2171	+328 (+17.80%)

Import changes for all files

Files	Import difference
Mathlib.NumberTheory.Padics.ValuativeRel	328

---

Declarations diff (regex)

+ instance : IsValuativeTopology ℚ_[p] := by
+ norm_lt_norm_iff_mulValuation_lt
+ norm_lt_zpow_iff_mulValuation_lt_exp

You can run this locally as follows

## from your `mathlib4` directory:
git clone https://github.com/leanprover-community/mathlib-ci.git ../mathlib-ci

## summary with just the declaration names:
../mathlib-ci/scripts/pr_summary/declarations_diff.sh <optional_commit>

## more verbose report:
../mathlib-ci/scripts/pr_summary/declarations_diff.sh long <optional_commit>

The doc-module for scripts/pr_summary/declarations_diff.sh in the mathlib-ci repository contains some details about this script.

Declarations diff (Lean -- unavailable)

⚠️ No declarations diff yet: there is no built master snapshot at this PR's merge-base (typically a bors-batch intermediate that CI never built). Merge master into this PR and push to refresh.

---

No changes to strong technical debt.

No changes to weak technical debt.

Current commit b0d6ade587
Reference commit 1f29011071

This script lives in the mathlib-ci repository. To run it locally, from your mathlib4 directory:

git clone https://github.com/leanprover-community/mathlib-ci.git ../mathlib-ci
../mathlib-ci/scripts/reporting/technical-debt-metrics.sh pr_summary

• The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
• The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).